Abstract:
A kind of active aggregate from practical project was used in the study. Based on practical mix proportion of hydraulic project, concrete was prepared to investigate the effect of AAR on concrete mechanical properties. After cured in standard curing room for 28 days, all the concrete samples were moved to the curing room with a curing temperature of 60±1 and a relative humidity of 90% - 95%. At several certain AAR expansion values, mechanical properties were tested. The results showed that concrete mechanical properties decreased with the increase of damage amount resulting from AAR. The damage of concrete was characterized by relative dynamic modulus of elasticity; according to the relationship between concrete mechanical properties and damage amount, the prediction model about the damage degree of mechanical properties was established.